==== tests/cases/conformance/expressions/unaryOperators/decrementOperator/decrementOperatorWithEnumTypeInvalidOperations.ts (10 errors) ====
    // -- operator on enum type
    
    enum ENUM { };
    enum ENUM1 { 1, 2, "" };
    
    // enum type var
    var ResultIsNumber1 = --ENUM;
                            ~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    var ResultIsNumber2 = --ENUM1;
                            ~~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    
    var ResultIsNumber3 = ENUM--;
                          ~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    var ResultIsNumber4 = ENUM1--;
                          ~~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    
    // enum type expressions
    var ResultIsNumber5 = --(ENUM[1] + ENUM[2]);
                            ~~~~~~~~~~~~~~~~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    var ResultIsNumber6 = (ENUM[1] + ENUM[2])--;
                          ~~~~~~~~~~~~~~~~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    
    // miss assignment operator
    --ENUM;
      ~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    --ENUM1;
      ~~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    
    ENUM--;
    ~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.
    ENUM1--;
    ~~~~~
!!! An arithmetic operand must be of type 'any', 'number' or an enum type.